Report
Spin triangle chain with ferromagnetic and antiferromagnetic interactions on the transition line
| العنوان: | Spin triangle chain with ferromagnetic and antiferromagnetic interactions on the transition line |
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| المؤلفون: | Krivnov, V. Ya., Dmitriev, D. V. |
| المصدر: | Journal of Physics: Condensed Matter, 35(9), 095802 (2023) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Statistical Mechanics |
| الوصف: | We investigate spin-$\frac{1}{2}$ anisotropic model of a linear chain of triangles with competing ferro- and antiferromagnetic interactions and ferromagneic Heisenberg interactions between triangles. For a certain ratio between interactions the one-magnon excitation band is dispersionless leading to an existence of localized-magnon states which form macroscopically degenerated ground states. The spectrum of excitations has a specific structure depending on the value of the triangle-triangle interaction. Such specific structure determines the low-temperature thermodynamics and, in particular, the temperature dependence of a specific heat. In the limit of strong anisotropy of interactions the spectrum has a multi-scale structure which consists of subsets rank-ordered on small parameter. Each subset is responsible for the appearance of the peak in the temperature dependence of the specific heat. Comment: 23 pages, 13 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1361-648X/acad55 |
| URL الوصول: | http://arxiv.org/abs/2209.14459 |
| رقم الانضمام: | edsarx.2209.14459 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1361-648X/acad55 |
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